Colour and gloss properties of pigment-printed synthetic leather using an ultraviolet-curable water-borne polyurethane acrylate binder and two photoinitiators at different ratios / Gülçin Baysal in COLORATION TECHNOLOGY, Vol. 135, N° 2 (04/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 2 (04/2019) . - p. 133-142 Titre : Colour and gloss properties of pigment-printed synthetic leather using an ultraviolet-curable water-borne polyurethane acrylate binder and two photoinitiators at different ratios Type de document : texte imprimé Auteurs : Gülçin Baysal, Auteur ; Berdan Kalav, Auteur ; Burcak Karaguzel Kayaoglu, Auteur Année de publication : 2019 Article en page(s) : p. 133-142 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Brillance (optique) Colorimétrie Copolymère uréthane acrylate Copolymères en émulsion Cuir synthétique imprimé Fourier, Spectroscopie infrarouge à transformée de Liants Photoamorceurs (chimie) Pigments Rayonnement ultraviolet Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This study reports on the colour and gloss properties of pigment-printed polyurethane-based synthetic leather using an ultraviolet (UV)-curable water-borne polyurethane acrylate binder and two types of photoinitiators (Omnirad 819 DW and Omnirad 500) at different ratios. The UV curing of printed synthetic leather samples was conducted with gallium and mercury lamps, either singly or in combination, at three different power levels. Chemical changes in the cured films because of the polymerisation of the UV-curing process were analysed by Fourier Transform-infrared spectroscopy, which showed that the polymerisation reaction occurred after UV curing in both the clear and in the pigmented films. The Omnirad 500 photoinitiator is more effective in surface curing and the Omnirad 819 DW photoinitiator is more effective in deep curing. The Omnirad 500 photoinitiator caused the gloss values to drop significantly, especially in the formulation including both photoinitiators, Omnirad 819 DW and Omnirad 500, at a 1:2 ratio, respectively. In the formulation including a higher ratio of the Omnirad 819 DW photoinitiator, higher gloss values were obtained compared with the formulation including a higher ratio of the Omnirad 500 photoinitiator. Considering all the results, the highest gloss value of 20.96 was obtained with samples printed with the formulation of the two photoinitiators at an equal ratio (1:1) cured under a gallium/mercury lamp combination at a power level of 90 W/cm. Moreover, the highest K/S value of 10.86 was obtained with samples printed with the formulation of the two photoinitiators at an equal ratio cured under the gallium lamp at 90 W/cm. Note de contenu : - EXPERIMENTAL : Materials - Methods - RESULTS AND DISCUSSION : UV curing and Fourier Transform-Infrared spectroscopy - Gloss measurements - Colour measurements DOI : 10.1111/cote.12386 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12386 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32327 [article]

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Effect of pigment colour on the printing performance of synthetic leather using a ultraviolet-curable water-borne polyurethane acrylate binder / Gülçin Baysal in COLORATION TECHNOLOGY, Vol. 135, N° 4 (08/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 4 (08/2019) . - p. 283-291 Titre : Effect of pigment colour on the printing performance of synthetic leather using a ultraviolet-curable water-borne polyurethane acrylate binder Type de document : texte imprimé Auteurs : Gülçin Baysal, Auteur ; Berdan Kalav, Auteur ; Burcak Karaguzel Kayaoglu, Auteur Année de publication : 2019 Article en page(s) : p. 283-291 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Brillance (optique) -- Mesure Colorimétrie Copolymère uréthane acrylate Cuir synthétique imprimé Encre en phase aqueuse Essai de dureté Impression jet d'encre Liants en phase aqueuse Photoamorceurs (chimie) Résistance à l'abrasion Résistance au chocs Index. décimale : 667.2 Colorants et pigments Résumé : The effect of pigment colours, cyan (C), magenta (M) and yellow (Y), and a blend of these (CMY blend) on the printing performance of synthetic leather using a ultraviolet (UV)-curable water-borne polyurethane acrylate binder and two types of photoinitiators was investigated. The curing process was carried out at different radiation doses using gallium and mercury UV lamps in combination. The performance of the prints was evaluated with abrasion resistance, crock fastness, gloss and hardness values and K/S. Chemical changes in the cured film structures due to UV curing were analysed by Fourier Transform–infrared spectroscopy measurements. The highest hardness values for clear and pigmented cured films were obtained with a gallium and mercury lamp combination at the highest energy density (1529 mJ/cm2). The highest K/S was obtained for the sample printed with the formulation including the C pigment and cured under a gallium and mercury lamp combination at low energy density (398 mJ/cm2). The M‐pigmented film displayed the highest hardness and abrasion resistance, whereas lower values were obtained with films pigmented with Y and C, and CMY blend, successively. The highest dry and wet crock values were obtained with the formulation including the M pigment. CMY-pigmented film showed the highest gloss values at all energy densities. The pigment colour affected the curing degree of printed films due to the different absorption/transmission intervals of each colour in the UV spectrum. Note de contenu : - EXPERIMENTAL : Materials - Methods - RESULTS AND DISCUSSION : UV curing and pendulum hardness measurements - FTIR - Colour measurements - Gloss measurements - Crock fastness - Abrasion resistance DOI : 10.1111/cote.12402 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12402 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32831 [article]

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The effect of ultraviolet-curable water-borne polyurethane acrylate binder concentration on the printing performance of synthetic leather / Gülçin Baysal in COLORATION TECHNOLOGY, Vol. 135, N° 2 (04/2019)  

[article]  inCOLORATION TECHNOLOGY > Vol. 135, N° 2 (04/2019) . - p. 111-120 Titre : The effect of ultraviolet-curable water-borne polyurethane acrylate binder concentration on the printing performance of synthetic leather Type de document : texte imprimé Auteurs : Gülçin Baysal, Auteur ; Berdan Kalav, Auteur ; Burcak Karaguzel Kayaoglu, Auteur Année de publication : 2019 Article en page(s) : p. 111-120 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorimétrie Copolymère uréthane acrylate Cuir synthétique imprimé Dureté (matériaux) Formulation (Génie chimique) Haut extrait sec Liants Photoréticulation Polymères en émulsion Rayonnement ultraviolet Résistance à l'abrasion Résistance au chocs Revêtements en phase aqueuse Sérigraphie Solidité de la couleur Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : In this paper, synthetic leather samples were screen printed with pigmented pastes including two types of photoinitiators and three different concentrations of ultraviolet (UV)-curable water-borne polyurethane acrylate binder. The curing process was conducted under different combinations of lamps (gallium, mercury, gallium/mercury and gallium/gallium/mercury) at three power levels. Abrasion resistance, crock fastness, hardness and colour strength were investigated. Chemical changes in the clear and pigmented film structures because of UV curing were analysed by Fourier Transform-infrared spectroscopy measurements. In hardness measurements, the highest hardness values were obtained with clear and pigmented formulations which have the highest solid content (57%). In colour measurements, higher K/S values were obtained in samples printed with the formulation having a binder concentration of 46%. Wet crock fastness values improved as the energy level increased during curing, and the highest values were obtained with a formulation which had a binder concentration of 57%. Greater amounts of binder in the formulations and increased amounts of energy applied to the surface during curing increased the hardness value of the prints, thus better abrasion resistance was obtained. Overall results suggested that the highest hardness, crock fastness and abrasion resistance values were obtained with the formulation with a binder concentration of 57%. However, for ease of application, printing efficiency and colour strength, the formulation with a binder concentration of 46% is recommended for printing, and curing under consecutive passes with gallium and mercury lamps at 120 W/cm is proposed in terms of energy efficiency and printing performance. Note de contenu : - EXPERIMENTAL : Materials - Methods - RESULTS AND DISCUSSION : UV curing and pendulum hardness measurements - Fourier transform infrared (FTIR) spectroscopy - Colour measurements - Crock fastness of printed synthetic leather samples - Martindale abrasion resistance measurements of printed synthetic samples DOI : 10.1111/cote.12382 En ligne : https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12382 Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32324 [article]

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